I created this environment using Unreal Engine 5.7.1. I used megascans and the trees I created, which are available on Fab :) I created a complete snow material that allows you to modify the snow on the environment assets at will. I created a small snowy footbridge... The water is created with the Water plugin and the Water Buoyancy Component plugin to manage the water physics and collisions with the rocks... :)
Video 1 ///
Snow Material ///